Top Rated for WebStorm

Multirun

Allows to run multiple run configurations at once: group multiple run configurations and start them in a single click.

BrowseWordAtCaret

Allows to easily browse next/previous word at caret and highlight other appearances of selected word.

RegexpTester

Regular Expression Tester for IntelliJ IDEA.

Frame Switcher

Plugin for more convenient switching between projects/frames/windows than is alt-tab or Window menu.

Autoscroll Save

At last, a handy way to save your Autoscroll to/from Source settings :).

Elm language plugin

Plugin for Elm language support.

Run Configuration as Action

Register all run configuration as actions.

Wrap to Column

Wraps text to the specified column width.

SQLScout (SQLite Support)

First-class SQLite support for Android Studio and IntelliJ IDEA.

Rainbow Brackets

Rainbow Brackets / Rainbow Parentheses for IntelliJ based IDEs.